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Theorem isorcl2 49853
Description: Reverse closure for isomorphism relations. (Contributed by Zhi Wang, 17-Nov-2025.)
Hypotheses
Ref Expression
isorcl.i 𝐼 = (Iso‘𝐶)
isorcl.f (𝜑𝐹 ∈ (𝑋𝐼𝑌))
isorcl2.b 𝐵 = (Base‘𝐶)
Assertion
Ref Expression
isorcl2 (𝜑 → (𝑋𝐵𝑌𝐵))

Proof of Theorem isorcl2
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 isorcl.f . . 3 (𝜑𝐹 ∈ (𝑋𝐼𝑌))
2 isorcl2.b . . . . 5 𝐵 = (Base‘𝐶)
3 eqid 2766 . . . . 5 (Inv‘𝐶) = (Inv‘𝐶)
4 isorcl.i . . . . . 6 𝐼 = (Iso‘𝐶)
54, 1isorcl 49852 . . . . 5 (𝜑𝐶 ∈ Cat)
62, 3, 5, 4isofval2 49851 . . . 4 (𝜑𝐼 = (𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦)))
76oveqd 7440 . . 3 (𝜑 → (𝑋𝐼𝑌) = (𝑋(𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌))
81, 7eleqtrd 2868 . 2 (𝜑𝐹 ∈ (𝑋(𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌))
9 eqid 2766 . . 3 (𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦)) = (𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))
109elmpocl 7664 . 2 (𝐹 ∈ (𝑋(𝑥𝐵, 𝑦𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌) → (𝑋𝐵𝑌𝐵))
118, 10syl 18 1 (𝜑 → (𝑋𝐵𝑌𝐵))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401   = wceq 1570  wcel 2146  dom cdm 5666  cfv 6543  (class class class)co 7423  cmpo 7425  Basecbs 17294  Invcinv 17827  Isociso 17828
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-rep 5243  ax-sep 5262  ax-nul 5274  ax-pow 5341  ax-pr 5409  ax-un 7745
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-ral 3083  df-rex 3093  df-reu 3373  df-rab 3420  df-v 3460  df-sbc 3748  df-csb 3857  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-iun 4963  df-br 5115  df-opab 5179  df-mpt 5198  df-id 5561  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-iota 6499  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-ov 7426  df-oprab 7427  df-mpo 7428  df-1st 7995  df-2nd 7996  df-inv 17830  df-iso 17831
This theorem is used by:  isoval2  49854  catcisoi  50219
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